I have a 96 mustang and i'm getting ready to replace the intake do to it be cracked think i'm gonna also do the pi intake swap maybe cams if i can find some. but not sure what spark plugs to buy i thought about getting the E3 but not sure if there worth the money and i read about the ngk plugs threading too far into the head.

 

Motorcraft platinums seem fine to me.
Haven't heard the NGK issue.

 

I run autolites.

 

X2 I got the platinum ones this round.

 

Make sure they are double platinum (platinum center and side electrodes) plugs--your '96 used Fords EDIS which is a wasted spark system, each plug in each pair fires in reverse polarity as opposed to the other.

 

I feel bad for your car

 

read about it here

http://www.modularheadshop.com/Artic...rk%20plugs.htm

so nobody has tried the E3 spark plugs? just trying to figure out if there the best as they say they are. also should i run a colder plug? its all stock right now other the flowmaster exhaust but its gonna have some bolt on's like h- pipe, cai a tuner and i might put on my nitrious kit that i have for my other car but not a big shot nothing over 100hp its jeted for 90hp and i will probably stick with that.

 

They are just a gimmick. If there was any real advantage Champion would have figured it out and started making them sometime over the 102 years they have been making spark plugs.

And if they really could increase fuel economy and reduce emissions they would be installed by every automaker as original equipment; as it would help them improve corporate average fuel economy (CAFE) and reduce the fines they pay to the EPA for not meeting the standards...

 

Copper is the best conductor of electricity. I wouldn't go with platinum. I got the NGK's that are copper. Not sure what they are called though.

 

It is true that copper has higher electrical and thermal conductivity than platinum or iridium; however as it is a completely unsuitable material from which to fabricate a high voltage electrode, only the core is copper on what are commonly referred to as "copper" spark plugs. The tip and side electrodes of the so-called "copper" plugs are just plain ol' nickel-chrome alloy same as any conventional plug--which as electrode material for a spark plug is a far second, as compared to platinum or iridium.


BTW--almost all (and maybe even all) precious metal electrode plugs also use copper cores. Here is a platinum plug cutaway, this happens to be a Denso however they are all pretty much the same:



Here's a good "Spark Plug 101" document. It's from WeaponX so it leans toward their plugs, but the facts are solid...